thermostat
noun /ˈθɜːməstæt/
/ˈθɜːrməstæt/
- a device that measures and controls the temperature of a machine or room, by switching the heating or cooling system on and off as necessary
Topics Engineeringc2温控器;恒温器 词源mid 19th cent.: from thermo- ‘of heat’ + -stat.